Sheet-metal car end.



W. G. BORN & J. L. LANE.

SHEET METAL CAR END.

APPLICATION HLED APR. 5. 1915.

Patented WWc /615ea6 G: (3mm IA'rnnr onsrcnf music o. BORN annaamns L. LANnfor CHICAGO, ILLINOIS, ASSIGNORS TO some Mons, a; sous, or cmcaoo, ILLINOIS, A conronarionoa rumors.

SHEET-METAL can nun Application on April 5, 1915. Serial at. 19,409.

To all whom it may concern Be it known that WQWVILLIAM Gilfions, a subject of the Emperor of Germany, and

JAnns L. LANE, a. citizen of the United States, both residing at Chicago, in the county of Cook-and State of Illinois, have invented certain new and useful Improve -v merits inv Sheet-ldeta'l Car Ends, of which the following is a specification.

Sheet-metal end-walls for railway boxcars with various styles and forms of stiff ening and strengthening corrugations or emboss ients have been proposed and used to some extent. Our inventionrelates in eneral to such metal car-ends, its main nd ending objects being the provision ofa sht -metal end wall possessing a maximum degree of strength with a minimum amount'ofplate defm'mation, and one with relatively long, sweeping curves which may be easily pressed, rather than onewith comparatively sharp or abrupt changes in shape or configuration.

A further "feature of'the invention is the use of such a design and shape that the metal during its pressing or deformation will not be materially stretched, that isto say, will retain nearly or substantially its original thickness throughout.

Another object of the invention is the formation of the plate into such a shape that its strength will be substantially uniform throughout, but with. however, itspointof greatest resistance to ideflection' below the center of vthe car-b0dy end. "By: avoiding sudden and abruptchanges inthe' shape of the metal, that is, by employing sweeping curves or gradual changes. in connection with the corrugations, there is less tendency for the plate to retain water, thereby discouraging or reducing the' formation ofuice.

' In order that those skilled in this art .may have a full and complete understandaccompanyingdrawing which forms a part. of this specification, and throughout the" variousviews of which, like reference characters refer ,to the-same parts.

In the 'dra'aing: Figure .1 is a face view 7 of the novel and improved vform ofsh'eet.

metal car end'r Fig. 2 is;a ewical cross-7' section on line 2-21of F1 1; Fig. 3 is a horizonta'lcross-seqtion on" me 3-3 of F1g..

Specification of Letters Patent.

' line 4-4 of Fig. 1.

Railway-car end-walls .in order to secure the greatest degree of Patented. May 9, 1916.

1; and Fig. 4 is a diagonal cross-sectionlon slightly higher than they are wide. and the center of pressure of a load is ordinarily below the geometrical center of such an endwall. It is desirable thereforev that the point of greatest strength of a sheet-metal--plate used for such a car-end should be at aps proximately the point, of greatest strain or load. A load, such as gram. for instance. constantly exerts an outwardpressure ion such a plate-wall, but, of course, such :1 normal strain is, greatly increased due to the sudden stopping and starting of the-train,

and other conditions which tend to shift the load longitudinally of the car-body.-

Although it has been stated that the pgint 'of greatest strength is below the geometrical center of the plate, it-is, nevertheless, to be borne in mind that one of the objects of the invention is to so emboss orcorrugate the plate whereby it will possess substan tially' uniform strength throughout, al-

though this ideal condition could ordinarily be only approximatedin actual practice.

' In the preferred incorporation of the inwention. as illustrated in the drawing, the originally fiat metal-plate 10 is pressed or shaped with suitable dies to provide a relatively large round boss 11 with its center below the center-of the plate for the reason indicated. The boss is somewhat convex. as at 12, and its edge 13 is of somewhat general conical formation, and merges into a conical portion 14: of relatively slight taper.

Experience has indicated that in pressedk metal-structures of this-general character.

strength, a comparatively definite or fixed relation must exist between the height or depth of the boss and its circumference. The

and. consequently. the size or diameter of the boss .is detern 'ned by such depth. The boss is further sti gngthened and reinforced by the use of the gradually sloping conical connection IL with thel)illh of the' plate remaining in the original plane.

As. illustrated, the four corners of the plate are each provided with a pressed bossof general triangular shape of less depth are ordinarily than tle circular boss-F At the bottorngof the pla'te, .the tivo itriangular bosses 1013- reinforcements 15 and 16 are entirely 1; sep a-ate fron 'one another, but at the upper portion 'thefipl'ate, wing to the greater pace present, the twocorresponding' parts 17 and 18 are united above the boss 11,

forming a continuous strengthening 'ribgoi' the shape illustrated. i It should be 'o'bs'e'ri abrupt 'or sudden c'ha that there no a the metal, and,v consequently, no material {stretching of it-with a're'fsulting' reduction in thickness. In other' pose'd, by deforniing in theanannei' indi of strength is secured bv the" design procated, with a mininnnn'reduction'in its gage thickness; Stated diifere'n'tly, the "central ":bossfis so designed astogreatl y strengthen "the plate, su'cl'r stiffening -'is reinforced lbyjth'e smaller supplemental bosses or def- -"-o'rn1ations at the cornersoftheplate, i

'- To those skilled in this artgit will be ap parent I that var'iou's; ,ininor fniechanical changes may be inade inthe structure here "i ii set'forth withoutd'ep i ture from the subof" itssubstantial :IfiAnembossed sheet-metal car-end plate of the character described 1 of general rec-1 r ta'jngularshape' having a-n "outer niarginal v portion con'sti-t-utingthe plane of the plate,-

-and' anainterrne'diate coneseation of-relati-vel y "less" height than saidboss, extending outwardly fronnthelia se ofythe boss and merging. into said marginal portion, sub= =stantially as-described. p

1 2. "Ag1' embossed sheet metal car-end plate= "of the character, described of general recti-ons, substantially as described,

es inthe shape 3. An embossed sheet-metal car-end plate ds, a niaximunr enti'on and Witha substantially-central relatively-large boss, 1

tangular shape haying. an outer .Jnarginal portion constituting the plane ofthe plate, a substantiallymentral relatively-large boss,- and an intermediate cone sectionoffrela- .tively less height than said boss eiitending outwardly fro'intlie base" of the boss and merging into said marginal portion, the plate also having a plurality of bosses of general triangular form at its corner porofthe character described ofgeneral rectangular shape liai ing an outer marginal -1')ortion constituting the plane of the 7 plate, a substa-ntiallycentral relatively-large boss a'cone section of relatively less heightj than the bossextending outwardly from the base of the latter and merging into said marginal portion and ajpluralityof bosses of general triangular form at'the. corner portions of'the plate, the two upper of said triangular bossesflbeing united above the 'niainboss, substantially as described.

4; An embossed sheet-metal car-end plate of the character described of general rec,- tangular shape having an outer marginal merging into the said marginal portion, the

corner portions of the plate having bosses, of general triangularform substantially as described I p 7 lVILLlAl /I 4G. BORN.

JAMES L. LANE- WVithesseS: I L

Wtnyrna Hanna: T. PSUL WAN. 

